Test with gdb only if gdb is installed
Test with gdb only if gdb is installed

git-svn-id: b6c97393e82be3812a607970066d172a5388f86f@3281 df83fd30-4cca-4c36-ab9d-e8b5583ccbd1

jpritikin/OpenMx,mhunter1/OpenMx,JuKa87/OpenMx,mhunter1/OpenMx,jpritikin/OpenMx,JuKa87/OpenMx,JuKa87/OpenMx,jpritikin/OpenMx,JuKa87/OpenMx,JuKa87/OpenMx,mhunter1/OpenMx,JuKa87/OpenMx,jpritikin/OpenMx,jpritikin/OpenMx,mhunter1/OpenMx,jpritikin/OpenMx,mhunter1/OpenMx,mhunter1/OpenMx